{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "METHODS : Forty patients with Parkinson ' s disease underwent serial , detailed assessments both after drug withdrawal ( \" off \" period ) and while taking their optimal medical regimens ( \" on \" period ) ."}
{"Disease": ["Parkinson ' s disease"], "Chemical": []}